Poll Results
No votes. Be the first one to vote.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
No votes. Be the first one to vote.
A. block cipher
The Data Encryption Standard (DES) is a symmetric-key block cipher that was widely used for encrypting electronic data. Developed in the early 1970s and adopted as a federal standard in the United States in 1977, DES uses a 56-bit key to encrypt data in 64-bit blocks. It operates through a series of permutation and substitution operations to transform plaintext into ciphertext.
DES was considered secure for many years, but as computing power increased, vulnerabilities were discovered that made it susceptible to brute-force attacks. As a result, DES has largely been replaced by more secure encryption standards, such as the Advanced Encryption Standard (AES). Despite its diminished use in modern applications, DES laid the groundwork for subsequent cryptographic methods and remains an important part of the history of data encryption.